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Home >> Mazda >> 1994 >> RX-7 Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Idle Control System >> Idle Speed Control (ISC) System >> ISC Valve
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ISC Valve

  1. Make sure fast idle cam has released throttle lever. See Figure . Disconnect ISC valve electrical connector. Connect ohmmeter to ISC valve 2-wire connector. See Figure . Measure resistance. Resistance should be 10.7-12.3 ohms at 68°F (20°C). If resistance is not within specification, replace ISC valve.
  2. With engine idling at operating temperature, disconnect ISC valve electrical connector. Engine speed should increase to 1000-1500 RPM. If engine speed does not increase, replace ISC valve.
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